JP7236485B2 - 三流体ノズルを用いた吸入用複合粒子の製造方法 - Google Patents
三流体ノズルを用いた吸入用複合粒子の製造方法 Download PDFInfo
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Description
a)サイズを縮小したAPI(0.5<PS<5μm)を大きな担体粒子(carrier particle)と混合する。最も一般的に使用され且つよく知られている担体はラクトース一水和物(lactose monohydrate)である。API粒子は担体の表面に付着し、製剤の経口吸入の際に担体の表面から離れる。次に粒子は肺の生理学的に適切な場所(physiologically relevant stages)に付着し、一方担体粒子は口と喉に付着する。この方法は「担体ベース(carrier-based)」として知られている。
1)医薬品有効成分(API)と賦形剤との両方を可溶化する薬学的に許容される溶媒システムを発見しようとする取り組みがあった。
-2つの別個の溶液/懸濁液が調製されるので、医薬品有効成分(API)/賦形剤の溶解度の制限がないこと;
-各供給の流速(140、150)及び組成の個々の制御が実行可能なので、工程の柔軟度が高いこと;
-良い空力特性を維持すると同時に、医薬品有効成分(API)の溶解度の制限がないので、工程の処理量が高いこと;
-医薬品有効成分(API)の被覆/カプセル化の範囲についてうまく制御できること;
-通常の二流体ノズルと比較して、医薬品有効成分(API)を溶解するのに必要な溶媒量が少なくなるので、最終残余有機溶媒含有量を少なくできること;
-他の従来のカプセル化方法論に比較して工程を単純化できること、を含む。
下記の実験の結果である空力特性及び薬物の均一性は、同じものに限定されないが、本発明についての成功した概念実証を論証している。
第1液体溶液 - 内側流路からの溶液流速;
第2液体溶液 - 外側流路からの液体流速;
内側固形分濃度 - 内側流路からの固形分濃度;
外側固形分濃度 - 外側流路からの固形分濃度;
吐出口温度 - 乾燥ガスの吐出口温度;
FPFED ・ カプセルからの放出量に関する細粒分。
Claims (13)
- 乾燥粉末吸入医薬製剤の調製方法であって、第1の溶媒及び活性剤を含む第1の溶液を用意し、第2の溶媒及び1以上の賦形剤を含む第2の溶液を用意し、前記活性剤及び前記1以上の賦形剤の両方を含む1以上の粒子を製造する外部混合三流体ノズルを有するスプレードライヤー中で前記第1及び第2の溶液を両方同時に乾燥することにより前記第1及び第2の溶媒を除去する調製方法であって、
前記外部混合三流体ノズルは内側流路と外側流路とを含み、前記第1の溶液は前記内側流路に供給され、前記第2の溶液は前記外側流路に供給されて、前記第1及び前記第2の溶媒が外部で混合されるように、乾燥チャンバに同心で送達され、
前記第1の溶媒は第2の溶媒と異なる溶媒であって、前記第1の溶媒は有機溶媒または少なくとも有機溶媒と水とを含む混合物であり、前記第2の溶媒は水または少なくとも水と有機溶媒とを含む混合物である調製方法。 - 前記1以上の賦形剤は前記活性剤よりも水溶性が高い請求項1に記載の調製方法。
- 前記1以上の粒子は5μm未満の質量中央径を有する請求項1または2に記載の調製方法。
- 前記1以上の粒子は、前記活性剤を少なくとも部分的にカプセル化した前記1以上の賦形剤を含む請求項1乃至3のいずれか1項に記載の調製方法。
- 前記1以上の粒子は、前記活性剤を全体的にカプセル化した前記1以上の賦形剤を含む請求項1乃至4のいずれか1項に記載の調製方法。
- 前記1以上の賦形剤は安定剤である請求項1乃至5のいずれか1項に記載の調製方法。
- 前記1以上の賦形剤は、アミノ酸、糖またはこれらの混合物からなる群から選択される1以上の成分を含む請求項1乃至6のいずれか1項に記載の調製方法。
- 前記糖はラクトース、トレハロース、またはラフィノースから選択される請求項7に記載の調製方法。
- 前記アミノ酸はロイシン、イソロイシン、トリロイシンまたはこれらの異性体から選択される請求項7または8に記載の調製方法。
- 前記1以上の賦形剤は1以上の成分、好ましくはトレハロースとロイシンとを含む請求項1乃至9のいずれか1項に記載の調製方法。
- 前記第2の溶液の供給速度は前記第1の溶液の供給速度よりも常時速い請求項1乃至10のいずれか1項に記載の調製方法。
- 前記活性剤は、温度20度で固形1gを溶解するのに少なくとも30部の水を必要とする請求項1乃至11のいずれか1項に記載の調製方法。
- 前記活性剤は活性薬剤である請求項1乃至12のいずれか1項に記載の調製方法。
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